Anahita is a remarkable social networking platform for building apps and services that connect people so they can share knowledge. As it is, Anahita provides the essential elements needed for launching a social network plus a powerful framework for extending and customizing it. Anahita is open source and it is available under the GPL3 license.
To install and get started on Anahita please read the guide at Getting Started
If you need any help with the Anahita installation or have general question about Anahita. You visit http://GetAnahita.com or follow the Anahita project group at http://www.GetAnahita.com/groups/group/42242-anahita